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Potentiometric study of vitamin D3 complexes with manganese(II), iron(II), iron(Ill) and zinc(II) in water-ethanol medium

Abstract : Vitamin D 3 (LH) complexes with manganese(II), iron(II), iron(III) and zinc(II) were identified in water-ethanol medium (30/70). Their stability constants were determined at 298 K and at a constant ionic strength of 0.100 M using potentiometric methods. The computerisation of the experimental data showed the presence of ML (M =metal, L=deprotonated vitamin D3) and ML2 species in all cases; in addition, the ML3 iron(Ill) complex was detected. The calculated overall stability constants /3 for Mn"L, FenL, FeI'L and ZnUL are, respectively, in logarithms, 12.4, 16.5, 28.5 and 16.5. Under the experimental conditions, the only protonated species MLH detected was with iron (III).
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https://hal.univ-angers.fr/hal-03199232
Contributeur : Mustayeen Khan <>
Soumis le : vendredi 16 avril 2021 - 18:22:26
Dernière modification le : lundi 19 avril 2021 - 10:44:49
Archivage à long terme le : : samedi 17 juillet 2021 - 18:11:35

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1999-J Inorg Biochem-Ana Lucia...
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A.L.R Mercê, B Szpoganicz, M Khan, X Do Than, G Bouet. Potentiometric study of vitamin D3 complexes with manganese(II), iron(II), iron(Ill) and zinc(II) in water-ethanol medium. Journal of Inorganic Biochemistry, Elsevier, 1999, 73 (3), pp.167-172. ⟨10.1016/s0162-0134(99)00014-8⟩. ⟨hal-03199232⟩

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